Well-known stage actress Makiri received a warning letter from Kaito Kid on this day: in the 26 letters swirling around, he came to receive the priceless "gem of destiny". Maori Kogoro was commissioned by Makiri to analyze the letter and believed that Kid would come to steal the gem on the last night of the performance. That night, he, Conan, Xiaolan and others came to the theater, where many policemen were waiting. To Conan's surprise, Kid appeared in front of everyone disguised as Kudo Shinichi, but after he and everyone else were nervous in different directions, the gem was not stolen. Conan realized that the letter warning letter was related to the flight. On the plane to Hokkaido that Conan, Xiaolan, Makiri and their colleagues took, there was another murder plan being carefully designed.